Z89.521

Z89.521: Acquired absence of right knee

Billable / specific codeICD-10-CMPOA exemptright

Z89.521 is a billable, specific ICD-10-CM code for acquired absence of right knee. It is valid for submission on a claim.

Check Z89.521 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above Z89.521

A category’s note binds every code beneath it.

Written on Z89: Acquired absence of limb

acquired deformities of limbs (M20-M21)
congenital absence of limbs (Q71-Q73)

Other codes that can never be billed with Z89.521

Their own Excludes1 notes name this code, so the conflict is not listed above.

M20Acquired deformities of fingers and toes
M21Other acquired deformities of limbs

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

Z89.521 is named in 9 Medicare coverage policies: 9 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A53057Billing and Coding: Home Health Occupational Therapy
A53058Billing and Coding: Home Health Physical Therapy
A53065Billing and Coding: Outpatient Physical Therapy
A56796Billing and Coding: Lower Extremity Major Joint Replacement (Hip and Knee)

Code history

Unchanged in every release from FY2024 to FY2027.